US3417599A - Compressing tool - Google Patents

Compressing tool Download PDF

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Publication number
US3417599A
US3417599A US589613A US58961366A US3417599A US 3417599 A US3417599 A US 3417599A US 589613 A US589613 A US 589613A US 58961366 A US58961366 A US 58961366A US 3417599 A US3417599 A US 3417599A
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US
United States
Prior art keywords
washers
die
dies
terminal
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US589613A
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English (en)
Inventor
Burns William Curtis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
AMP Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMP Inc filed Critical AMP Inc
Priority to US589613A priority Critical patent/US3417599A/en
Priority to GB43215/67A priority patent/GB1162269A/en
Priority to NL6713977A priority patent/NL6713977A/xx
Priority to FR1575539D priority patent/FR1575539A/fr
Priority to SE14491/67A priority patent/SE341995B/xx
Priority to ES346370A priority patent/ES346370A2/es
Priority to DE19671615651 priority patent/DE1615651A1/de
Application granted granted Critical
Publication of US3417599A publication Critical patent/US3417599A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping

Definitions

  • This invention relates to the art of compressing tools and more particularly to a new and improved tool for swaging or crimping metallic terminal members to electrical conductors to form electrical and mechanical connections therebetween, and also for mechanically conneting any two articles adaptable to crimping techniques.
  • Electrical terminals of a given type normally are available in a variety of sizes to accommodate various size electrical conductors.
  • Most crimping tools employ a separate set of dies for each size terminal. For a given set of dies and terminal size it can be determined to what extent the terminal barrel must be compressed around the conductor to achieve optimum electrical and mechanical characteristics. This optimum condition is then translated in terms of die closure or crimp height, that is the amount of distance between the upper and lower dies when bottoming occurs.
  • crimp height has several distinct disadvantages.
  • First a given size terminal usually is employed with more than one closely related wire size with the result that a set crimp height which is proper for one wire size will produce a crimp which is either too loose or too tight for another wire size.
  • Secondly a given size terminal will vary slightly in size due to manufacturing tolerances with the result that a set crimp height will produce crimps of varying quality. Manufacturing tolerances may produce drastic size variations in the case of preinsulated terminals, that is where the barrel portion of the terminal comprises a layer of terminal material, a layer of metallic ferrule material and a layer of plastic insulating material.
  • a further object is to provide a crimping tool whereby a single set of dies may be utilized for crimping a variety of sizes of terminal members.
  • a still further object of the present invention is to provide a tool which will produce uniform quality crimps on a given size terminal despite variations in size due to manufacturing tolerances.
  • FIGURE 1 is a side elevational view of a tool embodying the teachings of the present invention
  • FIGURE 2 is a sectional view taken along the line 22 of FIGURE 1 and showing the parts of the tool in engagement with a terminal but prior to applying force thereto;
  • FIGURE 3 is a cross-sectional view taken along the line 3-3 of FIGURE 2 but showing the tool in its closed position with respect to a relatively small terminal;
  • FIGURE 4 is a cross-sectional view similar to FIGURE 3 but showing the tool in its closed position with respect to a relatively large terminal;
  • FIGURES 5 through 8 are cross-sectional views of a pair of crimping dies used with the tool of FIGURE 1 showing the closed position of the dies when used on four different size terminals;
  • FIGURE 9 is a graph showing the load-deflection characteristics of the tool of FIGURE 1.
  • the tool 10 for use in connecting metallic terminals to electrical conductors.
  • the tool 10 comprises a generally C-shaped head section 12 secured to a cylindrical body portion 14 by pins or the like as indicated at 16.
  • a pair of male crimping dies 18 and 20 are rigidly secured at 22 to the head 12.
  • the die 18 will secure the center conductor of a wire to a suitable terminal while the die 20 will secure the insulation of the wire conductor to the terminal.
  • a pair of female dies 24 and 26 cooperate with the dies 18 and 20 respectively to produce the crimping operation.
  • the dies 24 and 26 are mounted for independent reciprocating movement within the head 12 and are guided therein by a cover plate 28.
  • a pin 30 extends from die 26 and is received within a circular opening 32 disposed in die 24 for retaining die 26 and for permitting relative motion between the dies 24 and 26.
  • a terminal locating arm 34 is mounted on the head 12 and is biased by a spring 36 to a position intersecting the opening between the male and female dies. The arm 34 insures that a terminal to be crimped is properly located between the male and female dies prior to operation of the tool.
  • An upper plate 38 is slidably disposed within body section 14 and has rigidly secured thereto the crimping die 24.
  • the die 26 has a slotted section 40 which receives a force imposing means shown in the figures as a series of Belleville washers 42. These washers have substantially a truncated cone configuration and are normally formed of a spring steel. It is to be understood that although Belleville washers have been shown and constitute a preferred form of force imposing means, certain other spring members could be substituted for the washers without departing from the spirit of the present invention.
  • the washers are retained within the slot 40 by means of a slidable plug 44 which has a press fit with the slotted section and extends beneath the lower end of the die 26.
  • a return spring 46 is disposed between the upper portion of body section 14 and the plate 38 and biases the plate downwardly as seen in FIGURE 2 to normally bias the dies 24 and 26 out of contact with the dies 18 and 20.
  • an intermediate plate 48 and a lower plate 50 are disposed within the cylindrical body 14 .
  • a series of spring washers 52 are disposed between the upper plate 38 and the intermediate plate 48 and a further series of spring washers 54 are disposed between the intermediate plate 48 and the lower plate 50.
  • the lower plate 50 rests on the upper end of a ram 56, the ram being slidable within the body 14 through an opening in the cylinder closure member 58.
  • a screw or the like 60 extends through openings in the intermediate plate 48 and lower plate 50 and threadably engages the ram 56. The screw passes freely through the central openings in the wash- 6 ers 54 and 52 so as not to impede displacement thereof.
  • the closure member 58 has a pair of depending legs 62 extending therefrom to which are secured a pair of intermediate links 64.
  • a pair of handles 66 are pinned at 68 to the links 64 and are pinned at 70 to the lower end of ram 56. In normal use the handles 66 will be grasped by an operator and pivoted between their opened and closed position to operate the tool and effect reciprocation of the ram 56.
  • FIGURE 2 the tool is shown in its partially closed position, i.e. the crimping dies would be in light contact with a terminal.
  • the return spring 46 is partially compressed while the washers 42, 52 and 54 are in their relaxed condition.
  • the lower plate 50 would be adjacent member 58 at the lower end of the cylinder 14.
  • the ram 56 moves upwardly and positions the plates and washers as shown in FIGURE 2.
  • the terminal and wire conductor 72 are placed between the upper and lower crimping dies and the handles are pivoted toward each other to the position of FIGURE 2, whereat the terminal is loosely held after being positioned by the locating arm 34.
  • FIGURE 9 wherein there is shown a graph illustrating the spring characteristics of the particular spring washers employed in the present tool. It is to be understood that the particular washers which will be described constitute a preferred form of the invention and that other washers or sprin members could be used as long as these other washers or spring members exhibit characteristics which are similar to the characteristics of the preferred form of washers.
  • Conical spring washers may be produced to provide varying load-deflection characteristics.
  • the shape of the load-deflection curve for a particular spring washer will depend on the relationship between the thickness of the washer and the amount of oflset or dish.
  • the load deflection curve shown in FIGURE 9 is a composite curve which represents the force output exerted by the washers 52 and 54.
  • the particular washers chosen for the series 54 will exert the force of 1500 pounds when deflected to their flat position. From FIGURE 9 it can be seen that a deflection ranging between .070 and .080 inch will yield approximately 1500 pounds.
  • the load-deflection curve would follow the dotted line 74 since the washers 54 would have reached their flat position at this point and would yield an infinite load with no further deflection.
  • the particular washers chosen for the group 52 will exert a force of approximately 3000 pounds when fully deflected. As seen in FIGURE 9 a displacement ranging between .142 and .152 inch will yield approximately 3000 pounds. If the washers 54 were not present in the tool the load deflection curve of the washers 52 would substantially follow the path indicated by the dotted line 76.
  • the particular tool illustrated has been designed for use with four difl'erent size terminals.
  • the largest size, shown in phantom in FIGURE 5, requires a force of 3000 pounds for an effective crimp.
  • the intermediate and small size terminals, shown in FIGURES 6-8 respectively, require a crimping force of approximately 1500 pounds for an efiective crimp,
  • the relative position of the upper and lower dies is shown in FIGURES 58 and it is important to note in these figures that the dies never bottom or completely close regardless of the size terminal being used, this being a drastic departure from conventional crimping tools. Since the dies do not bottom, the manufacturing tolerances of the dies which must be rigidly held in conventional tools are not critical with the present tool, thus resulting in a considerable savings in the cost of die manufacture.
  • FIGURE 3 the tool is shown in its position after having fully crimped a relatively small terminal. It can be seen that the washers 54 are approximately flat so that they are delivering their full 1500 pounds whereas the washers 52 remain substantially in an unstressed condition. Since the terminal is relatively small and considerable hand travel has taken place prior to the washers being loaded, the total deflection of the washers will be in the range of .070 to .080 inch resulting in the 1500 pounds pressure being applied to the terminal.
  • the operation thus far described indicates that 1500 pounds is being delivered to the lower terminal crimping die 24 and thus to the terminal barrel.
  • This means constitutes the washers 42 previously described.
  • the washers 42 are designed in this particular embodiment of the tool to deliver 300 pounds upon full compression.
  • On the intermediate or smaller size terminals where 1500 pounds is applied to the barrel it is desirable to place a load of approximately pounds on the insulation portion of the terminal. Movement of plate 38 upwardly during the crimping operation will cause the slidable plug 44 to exert a force on the washers 42 and thus an the die 26. However the washers 42 will compress under the load thus allowing the die 26 to move relative to the die 24 to thereby impart the lower load to the terminal insulation.
  • FIGURE 4 the tool is shown in position after completing a crimp on a relatively large terminal. Due to the large displacement, in the area of .142 to .152 inch, the washers 54 will be totally compressed and the washers 52 will also be compressed into a near flat condition. Thus referring again to FIG- URE 9 the total load delivered by the two series of washers will be approximately 3000 pounds.
  • the washers 42 in the terminal insulating die 26 will be compressed to a near fiat condition and will deliver their full 300 pounds which is the desirable load applied to the insulation of a large terminal.
  • the various groups of washers 42, 52 and 54 have been shown in specific configurations such as a parallel arrangement and a series arrangement. It is to be understood that the particular groups of washers may be changed in order to produce the desired load output.
  • a compressing device comprising a tool body, a first die fixed to said body, a second die movable relative to said body and cooperable with said first die to compress :an article disposed therebetween, first means secured to said second die and movable relative to said body, second means movable relative to said body and said first means, operating means to effect movement of said second means, and first and second resilient means interposed between said first and second means, the first said resilient means having different force transmitting capabilities than the second said resilient means, whereby said operating means causes said resilient means to transmit force from said dies to an article disposed between said dies, the amount of said force being dependent upon the degree ofcompression of said first and second resilient means.
  • a compressing device as set forth in claim 1 further comprising a third die mounted on said first means, and resilient means interposed between said third die and said first means for permitting limited relative motion between said third die and said second die.
  • a compressing device as set forth in claim 1 wherein said first resilient means has approximately twice the force transmitting capability of said second resilient means.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
US589613A 1966-10-26 1966-10-26 Compressing tool Expired - Lifetime US3417599A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US589613A US3417599A (en) 1966-10-26 1966-10-26 Compressing tool
GB43215/67A GB1162269A (en) 1966-10-26 1967-09-22 A Compressing Tool
NL6713977A NL6713977A (fr) 1966-10-26 1967-10-13
FR1575539D FR1575539A (fr) 1966-10-26 1967-10-20
SE14491/67A SE341995B (fr) 1966-10-26 1967-10-23
ES346370A ES346370A2 (es) 1966-10-26 1967-10-24 Un dispositivo de recalcar.
DE19671615651 DE1615651A1 (de) 1966-10-26 1967-10-24 Wuergezange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US589613A US3417599A (en) 1966-10-26 1966-10-26 Compressing tool

Publications (1)

Publication Number Publication Date
US3417599A true US3417599A (en) 1968-12-24

Family

ID=24358744

Family Applications (1)

Application Number Title Priority Date Filing Date
US589613A Expired - Lifetime US3417599A (en) 1966-10-26 1966-10-26 Compressing tool

Country Status (7)

Country Link
US (1) US3417599A (fr)
DE (1) DE1615651A1 (fr)
ES (1) ES346370A2 (fr)
FR (1) FR1575539A (fr)
GB (1) GB1162269A (fr)
NL (1) NL6713977A (fr)
SE (1) SE341995B (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576122A (en) * 1969-03-26 1971-04-27 Thomas & Betts Corp Crimping tool
US3713322A (en) * 1971-01-06 1973-01-30 Deutsch Co Elec Comp Crimping tool
US4199972A (en) * 1976-01-08 1980-04-29 Pressmaster A.B. Gripping or pressing appliance
US4283933A (en) * 1977-11-18 1981-08-18 Pressmaster A.B. Gripping or pressing tool
US4368632A (en) * 1981-01-27 1983-01-18 Kearney-National Inc. Apparatus for reducing the cross sectional area of a wire
US4631950A (en) * 1984-05-17 1986-12-30 The National Machinery Company Progressive former with removable tooling
US4667502A (en) * 1982-10-01 1987-05-26 Square D Company Hydraulic compression apparatus
US4709599A (en) * 1985-12-26 1987-12-01 Buck David A Compensating jaw assembly for power tongs
US4723434A (en) * 1984-10-29 1988-02-09 Square D Company Centering device for hydraulic compression tools
US4754636A (en) * 1985-05-20 1988-07-05 Amp Incorporated Connector locating device for crimping tools
US5042286A (en) * 1988-05-09 1991-08-27 C.A. Weidmuller Gmbh & Co. Manually operated pliers-type tool
US5113679A (en) * 1990-06-27 1992-05-19 Burndy Corporation Apparatus for crimping articles
US5152162A (en) * 1990-06-27 1992-10-06 Burndy Corporation System and method for crimping articles
US5195042A (en) * 1990-06-27 1993-03-16 Burndy Corporation Apparatus and method for controlling crimping of articles
US5392508A (en) * 1992-12-17 1995-02-28 Cable Ready, Inc. Axial deformation crimping tool
US5551274A (en) * 1994-11-21 1996-09-03 Clearing Niagara, Inc. Impact absorption for stamping press
US5596800A (en) * 1992-12-17 1997-01-28 Cable Ready, Inc. Crimping tool with ratchet mechanism
US5893289A (en) * 1997-06-27 1999-04-13 The Whitaker Corporation Machine having crimp height compensation
US5974659A (en) * 1996-05-23 1999-11-02 Kesinger; Donald A. Machine for repetitively applying connectors on cable ends to form round connections
DE3941447C2 (de) * 1988-12-23 1999-12-02 Utica Ets Inc Mechanischer Kraftverstärker
US20080141753A1 (en) * 2006-12-14 2008-06-19 Intelligent Design Group, Inc. Method and apparatus for securing connecting ferrules
US8726713B2 (en) * 2012-10-09 2014-05-20 Rostra Tool Company Crimping tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1581725A (en) * 1976-12-15 1980-12-17 Pressmaster Ab Appliances having cooperating working jaws
DE4039435C1 (fr) * 1990-12-11 1992-06-25 Wezag Gmbh Werkzeugfabrik, 3570 Stadtallendorf, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953185A (en) * 1957-09-13 1960-09-20 Burndy Corp Terminal and cable stop
AT218593B (de) * 1959-06-25 1961-12-11 Schiffmann Gmbh Alois Kerbwerkzeug
CA735670A (en) * 1966-06-07 A. Lee James Manually operable crimping tools
US3281926A (en) * 1963-08-21 1966-11-01 Etc Inc Means for positioning connectors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA735670A (en) * 1966-06-07 A. Lee James Manually operable crimping tools
US2953185A (en) * 1957-09-13 1960-09-20 Burndy Corp Terminal and cable stop
AT218593B (de) * 1959-06-25 1961-12-11 Schiffmann Gmbh Alois Kerbwerkzeug
US3281926A (en) * 1963-08-21 1966-11-01 Etc Inc Means for positioning connectors

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576122A (en) * 1969-03-26 1971-04-27 Thomas & Betts Corp Crimping tool
US3713322A (en) * 1971-01-06 1973-01-30 Deutsch Co Elec Comp Crimping tool
US4199972A (en) * 1976-01-08 1980-04-29 Pressmaster A.B. Gripping or pressing appliance
US4283933A (en) * 1977-11-18 1981-08-18 Pressmaster A.B. Gripping or pressing tool
US4368632A (en) * 1981-01-27 1983-01-18 Kearney-National Inc. Apparatus for reducing the cross sectional area of a wire
US4667502A (en) * 1982-10-01 1987-05-26 Square D Company Hydraulic compression apparatus
US4631950A (en) * 1984-05-17 1986-12-30 The National Machinery Company Progressive former with removable tooling
US4723434A (en) * 1984-10-29 1988-02-09 Square D Company Centering device for hydraulic compression tools
US4754636A (en) * 1985-05-20 1988-07-05 Amp Incorporated Connector locating device for crimping tools
US4709599A (en) * 1985-12-26 1987-12-01 Buck David A Compensating jaw assembly for power tongs
US5042286A (en) * 1988-05-09 1991-08-27 C.A. Weidmuller Gmbh & Co. Manually operated pliers-type tool
DE3941447C2 (de) * 1988-12-23 1999-12-02 Utica Ets Inc Mechanischer Kraftverstärker
US5113679A (en) * 1990-06-27 1992-05-19 Burndy Corporation Apparatus for crimping articles
US5152162A (en) * 1990-06-27 1992-10-06 Burndy Corporation System and method for crimping articles
US5195042A (en) * 1990-06-27 1993-03-16 Burndy Corporation Apparatus and method for controlling crimping of articles
US5392508A (en) * 1992-12-17 1995-02-28 Cable Ready, Inc. Axial deformation crimping tool
US5596800A (en) * 1992-12-17 1997-01-28 Cable Ready, Inc. Crimping tool with ratchet mechanism
US5551274A (en) * 1994-11-21 1996-09-03 Clearing Niagara, Inc. Impact absorption for stamping press
US5974659A (en) * 1996-05-23 1999-11-02 Kesinger; Donald A. Machine for repetitively applying connectors on cable ends to form round connections
US5893289A (en) * 1997-06-27 1999-04-13 The Whitaker Corporation Machine having crimp height compensation
US20080141753A1 (en) * 2006-12-14 2008-06-19 Intelligent Design Group, Inc. Method and apparatus for securing connecting ferrules
US7409847B2 (en) 2006-12-14 2008-08-12 Intelligent Design Group, Inc. Method and apparatus for securing connecting ferrules
US8726713B2 (en) * 2012-10-09 2014-05-20 Rostra Tool Company Crimping tool

Also Published As

Publication number Publication date
ES346370A2 (es) 1968-12-16
FR1575539A (fr) 1969-07-25
SE341995B (fr) 1972-01-24
DE1615651A1 (de) 1970-05-21
GB1162269A (en) 1969-08-20
NL6713977A (fr) 1968-04-29

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